(19)
(11) EP 2 345 609 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
01.05.2013 Bulletin 2013/18

(43) Date of publication A2:
20.07.2011 Bulletin 2011/29

(21) Application number: 11150463.5

(22) Date of filing: 10.01.2011
(51) International Patent Classification (IPC): 
B65H 7/06(2006.01)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME

(30) Priority: 19.01.2010 JP 2010009440
16.12.2010 JP 2010280770

(71) Applicant: Ricoh Company Ltd.
Tokyo 143-8555 (JP)

(72) Inventors:
  • Ishizaki, Yuusuke
    Tokyo 143-8555 (JP)
  • Koike, Takahisa
    Tokyo 143-8555 (JP)

(74) Representative: Engelhard, Maximilian 
Schwabe - Sandmair - Marx Patentanwälte Stuntzstrasse 16
81677 München
81677 München (DE)

   


(54) Conveying device, image forming apparatus, and program


(57) An image forming apparatus includes a feed unit (1), a sensor (430), a control unit (115), a measuring unit (117), and a determining unit (119). The feed unit (1) conveys a sheet P. The sensor (430) detects the sheet P being conveyed. The control unit (115) controls to change the force acting on the sheet from that is in normal conveyance of the sheet. The measuring unit (117) measures a measurement value related to conveyance speed of the detected sheet with the acting force changed. The determining unit (119) determines whether there is an indication of abnormality in conveyance of the sheet on the basis of the measurement value.







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